Thompson #2
Thompson #2 is an earth dam located in Mesa County, Colorado, built in 1953. It carries a Low hazard potential classification and has a fair condition assessment.
About Thompson #2
The primary purpose of Thompson #2 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Micheal Mcmanus (private). It impounds the Trail Canyon Wash near Dewey, Utah.
The dam stands 34 feet tall and stretches 1,220 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 393 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1953, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/20/1994. That was over 31 years ago.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Colorado |
| County | Mesa |
| Nearest City | Dewey, Utah |
| River/Stream | Trail Canyon Wash |
| Coordinates | 39.03501, -108.76557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 32 ft |
| Dam Length | 1,220 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 393 acre-ft |
| Max Storage | 393 acre-ft |
| Normal Storage | 243 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 2,937 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | MICHEAL MCMANUS |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/20/1994 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CO00322 |
| Federal ID | CO00322 |
| More Info | State Dam Safety Program |